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首页> 外文期刊>Materials Chemistry and Physics >The fine-grained KNN-LN ceramics densified from nanoparticles obtained by an economical sol-gel route
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The fine-grained KNN-LN ceramics densified from nanoparticles obtained by an economical sol-gel route

机译:由通过经济的溶胶-凝胶法获得的纳米颗粒致密化的细粒KNN-LN陶瓷

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摘要

(1-x)(K_(0.5)Na_(0.5))NbO_3-xLiNbO_3 ((1-x)KNN-xLN) nanoparticles with the mean particle size about 20-30 nm have been prepared by an economical sol-gel routes using Nb_2O_5 as Nb source. Due to the high sintering ability of nano-particles, fine-grained KNN-LN lead-free ceramics have been densified at the temperature below 1000℃. X-ray diffraction analysis indicated that the phase structure of the ceramics changed from orthorhombic to tetragonal at x = 0.08-0.10. When the x reached 0.10 and above, the perovskite structure could not be maintained and the impurity phases of K_3Li_22Nb_5O_(15) and LiNbO_3 appeared, indicating that x = 0.10 is near the solubility limit. Optimized parameters, such as d_(33) = 170 pC/N and k_p = 0.40, were achieved in 0.90KNN-0.10LN systems. Due to the merits of fine-grained structure and low sintering temperatures, it will be helpful to the application of KNN-LN materials for lead-free multilayer piezoelectric actuator.
机译:通过经济的溶胶-凝胶法使用以下方法制备了平均粒径约为20-30 nm的(1-x)(K_(0.5)Na_(0.5))NbO_3-xLiNbO_3((1-x)KNN-xLN)纳米粒子Nb_2O_5作为Nb源。由于纳米粒子的高烧结能力,细化的KNN-LN无铅陶瓷已在低于1000℃的温度下致密化。 X射线衍射分析表明,在x = 0.08-0.10时,陶瓷的相结构从正交晶变为四方晶。当x达到0.10以上时,不能保持钙钛矿结构,并且出现K_3Li_22Nb_5O_(15)和LiNbO_3的杂质相,表明x = 0.10接近溶解度极限。在0.90KNN-0.10LN系统中获得了优化参数,例如d_(33)= 170 pC / N和k_p = 0.40。由于具有细粒结构和低烧结温度的优点,这将有助于KNN-LN材料在无铅多层压电致动器中的应用。

著录项

  • 来源
    《Materials Chemistry and Physics》 |2012年第1期|518-522|共5页
  • 作者单位

    Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;

    Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;

    Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;

    Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;

    Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;

    Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chemical synthesis; ceramics; piezoelectricity;

    机译:化学合成陶瓷;压电;

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